Super Cap Seal XL 23ft (2 1/8" W x 1/2" H) and Ultimate Tailgate Seal with Taper Seal COMBO Pack COMBO Pack saves 25%. Complete pack includes 2 seals, putty tape, alcohol pads and detailed instructions. 23ft for mounting truck caps or camper shells on trucks with extra wide bed rails and that weigh over 200 lbs. Fills all bed rail gaps. Includes 10ft Ultimate Tailgate Seal with Taper Seal for the tailgate gap and sidewalls. High quality, long-lasting EPDM rubber seals. Preferred by professional installers over PVC/foam seals. Excellent compression set resistance for maximum service life and vibration absorption No need to replace these seals every time your cap is removed.